Preheat your oven to 350°F (175°C) and grease a donut pan or mini muffin tin.

In a large mixing bowl, whisk together the mashed bananas, pure maple syrup (or honey), and your choice of oil or water.

Gradually add the dry ingredients to the banana mixture, including flour, baking powder, and salt; stir gently until just combined.

Using a spoon or piping bag, evenly divide the donut batter into the prepared pan, filling each cavity about three-quarters full.

Bake in the preheated oven for about 8 minutes or until golden brown, checking with a toothpick for doneness.

Remove the donut pan from the oven and allow it to cool for a few minutes before lifting the donuts out.

Once cooled, top with cinnamon sugar, cream cheese frosting, or simple glaze as desired.